Exception Messages

[Wanderer]

On Monday, October 15, 2012 1:18:52 PM UTC-4, Wanderer wrote:
> On Monday, October 15, 2012 12:34:53 PM UTC-4, MRAB wrote:
> 
> 
> 
> > 
> 
> > Yes, but you've put the message in msg, and Exception doesn't have that
> 
> > 
> 
> > attribute.
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> > 
> 
> 
> 
> That's weird. I got this Exception class definition idea from this post by Guido van Rostrum, Where he gives this main function to look like
> 
> 
> 
> import sys
> 
> import getopt
> 
> 
> 
> class Usage(Exception):
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>     def __init__(self, msg):
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>         self.msg = msg
> 
> 
> 
> def main(argv=None):
> 
>     if argv is None:
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>         argv = sys.argv
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>     try:
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>         try:
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>             opts, args = getopt.getopt(argv[1:], "h", ["help"])
> 
>         except getopt.error, msg:
> 
>              raise Usage(msg)
> 
>         # more code, unchanged
> 
>     except Usage, err:
> 
>         print >>sys.stderr, err.msg
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>         print >>sys.stderr, "for help use --help"
> 
>         return 2
> 
> 
> 
> if __name__ == "__main__":
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>     sys.exit(main())
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> 
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> http://www.artima.com/weblogs/viewpost.jsp?thread=4829

Oops. I meant Guido van Rossum